Republican U.S. Sen. Scott P. Brown and his Democratic opponent Elizabeth Warren were crisscrossing the state this weekend with both stopping to fire up supporters in Central Massachusetts as they ramped up a final push for votes.

Ms. Warren was in Auburn standing on a stool in the parking lot of the United Steelworkers hall yesterday afternoon to see over the crowd of about 250 supporters, many of whom were canvassing neighborhoods around the region yesterday for votes.

“It is good to be here. Central Mass is the heart of Massachusetts and it’s going to be the heart of this campaign,” Ms. Warren told the cheering crowd before offering them some of her closing arguments.

She talked about the importance of public education, the need for equal pay for equal work and keeping promises to military families and veterans.

She said her opponent “too often stands with the millionaires, with the billionaires and with the big oil companies.”

“I want to go to Washington to fight for working families. That is what it is all about for me,” she said asking supporters to get others to the polls to vote for her.

“We’ve got four days. Are you ready to knock on doors, make the phone calls, make the plans to get yourself to vote, your family members to vote, your friends to vote, your neighbors to vote? Remember it’s about persuasion, but it is also about getting all those folks to the polls,” Ms. Warren said with the audience roaring back in approval.

After the sun went down, Mr. Brown wheeled into Worcester on his big blue campaign bus for a rally at Union Station, where about 350 of his supporters cheered his stump speech.

He and his wife, Gail Huff, both spoke nostalgically of the enthusiastic rally he held at Mechanics Hall before he won the 2010 special election to serve out the late Edward M. Kennedy’s term.

“Worcester has a special place in our hearts,” the senator said. “I will never, ever forget what we did in 2010, when we were at Mechanics Hall. It was like something I had never seen, and this is like something I have never seen,” he said of the crowd cheering him.

Mr. Brown said unemployment is rising and his opponent wants to raise taxes while offering “less problem-solving” in Washington. He called for Democrats, independents and Republicans to rally behind him. “We are Americans first,” he said pointing with his index finger and panning across the audience.

Among those warming up the crowed at the train station were Governor’s Councilor Jen Caissie of Oxford, who ripped what she called Ms. Warren’s “poisonous, partisan, divisive politics,” and called her a “carpetbagger from Oklahoma,” because she grew up in that state. Ms. Caissie also echoed a closing theme of the campaign, asserting that Mr. Brown “has put people, you, over party.”

Mr. Brown, who was born in Maine and grew up in Massachusetts, said Ms. Warren was trying to divide the haves and the have-nots, and pit rich against poor and men against women. “I’m not a divider. I’m a unifier,” he said. “If we continue to move down the path of gridlock and continuing problems, we are going to be in deep trouble. There is a $16 trillion national debt right now.”

Ms. Warren yesterday talked about how lessons of her life are playing out in the issues of the campaign.

She said her father was a janitor and that opportunity opened up for her because of public schools, including the community college she attended for $50 a semester, as the Harvard Law School professor talked about the importance of funding education.

Ms. Warren said she also learned lessons from her three older brothers, all of whom served in the military.

From her older brother who flew 288 combat missions in Vietnam, she said, “I learned that we honor our promises to our military families and to our vets.” Of her next older one, who worked in the building industry, raised three children, earned a pension and was a member of the international union of operating engineers, she said, “He taught me that we support our unions because unions helped build America’s middle class.”

Another lesson she said has come from her next oldest brother, who is now dependent on Social Security and Medicare. “What he taught me was that we honor our promises to our seniors. We keep Social Security and Medicare and health care for all of us. You bet,” she said.

About 250 supporters and campaign volunteers, many of whom were labor union members, swarmed around Ms. Warren at her event in the parking lot of the United Steelworkers hall. They gripped her hands, introduced their children and many promised to help get out the vote for her on Tuesday.

U.S. Rep. James P. McGovern, D-Worcester, told the campaign canvassers at the event that they are “the secret weapon of this campaign. “Scott Brown doesn’t have this. Scott Brown has a lot of paid consultants and a lot of TV commercials and a lot of paid-for mailings. What he doesn’t have is this kind of army of volunteers, going door to door that are talking to their neighbors and their friends and everyone who will listen about the importance of this campaign,” Mr. McGovern said.

One of those canvassers, Barbara Merolli, a librarian from Auburn, said she has been knocking on doors on weekends over the last month urging people to vote for Ms. Warren and tracking voters who strongly support or are leading toward Ms. Warren.

She said she can usually get to about 50 doors an hour. The early pitch at those doorsteps, she said, was asking if people had heard about Ms. Warren and talking about her, but now she said she is mostly checking if people plan to get to the polls and telling them, “She’s for the people.”

Beverly Goodale of West Boylston, who said she was an independent voter, was among those holding up Scott Brown signs at Union Station last night.

“I like him because he is an independent voice. Massachusetts needs a two-party system. There are more people here than just Democrats. There are Republicans. There are independents. He’s the first person that has gone after helping both sides,” she said. “I am sick of the bickering and fighting going on” in Washington.

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